Design And Numerical Simulation Of Carbon Fiber Reinforced Pressure Vessel

Pressure vessels have a wide range of application scenarios and complex working environments,but pressure vessels made of steel materials have high quality and limited pressure bearing capacity,which cannot meet the current needs of different industries.Carbon fiber composite materials have the advantages of high strength,low density,and corrosion resistance.Applying carbon fiber composite materials to pressure vessels has greatly solved the problems of engineering applications.However,the experimental cost of carbon fiber composite pressure vessels is high,and the design is relatively complex.In the pre design period,the design method dominated by computer simulation is mainly used.In this paper,the following research was conducted on a type Ⅲ composite pressure vessel:(1)Firstly,the material properties and constitutive equations of carbon fiber composites are studied,and the problem of material direction transformation of carbon fiber composites in finite element analysis,as well as the mechanical models of intra-laminar and interlaminar damage of composites are discussed.(2)According to the design requirements,the design standard of GB/T35544-2017 Compressed Hydrogen Aluminum Liner Carbon Fiber All-Wound Gas Cylinders for Vehicles,and the requirements of filament winding,the paper explores the structural dimensions of the aluminum alloy lining.In addition,the paper also uses the grid theory to design the thickness and winding angle of the carbon fiber winding layer,and discusses the optimal solution of the reaming and winding of composite pressure vessels.(3)Based on the filament winding trajectory equation of carbon fiber in the barrel section and the head section,the filament winding program is written in the MATLAB software to simulate the filament winding process,so as to observe whether there is overlapping and sliding phenomenon in the filament winding process.(4)The finite element model of composite pressure vessel is established,the influence of self-tightening treatment on composite pressure vessel is explored,and the minimum burst pressure of composite pressure vessel is calculated by finite element method.Finally,the progressive damage analysis of composite carbon fiber winding layer is carried out.The paper can provide theoretical and technical support for the structural design and simulation calculation of Type Ⅲ vehicle-mounted gas cylinder,and finally verify the rationality and accuracy of the finite element strength analysis.It can improve the design efficiency and speed up the design cycle for the preparation of high-performance carbon fiber composite pressure vessels.